AHA-1540A, AHA-1542A Hard Disk/Floppy Controller Settings and Configuration
ADAPTEC, INC.
AHA-1540A, AHA-1542A
Data bus: | 16-bit, ISA |
Size: | Full-length, full-height card |
Hard drives supported: | Up to seven SCSI devices |
Floppy drives supported: | Two 360KB, 720KB, 1.2MB or 1.44MB |
CONNECTIONS | |
Function | Location |
50-pin SCSI connector-external | CN1 |
50-pin SCSI connector-internal | CN2 |
34-pin data cable connector-floppy drive | CN4 |
4-pin connector-drive active LED | J5 |
SCSI ADDRESS | ||||
SCSI ID | J1/jumper 4 | J1/jumper 5 | J1/jumper 6 | |
» | 7 | open | open | open |
| 6 | closed | open | open |
| 5 | open | closed | open |
| 4 | closed | closed | open |
| 3 | open | open | closed |
| 2 | closed | open | closed |
| 1 | open | closed | closed |
| 0 | closed | closed | closed |
USER CONFIGURABLE SETTINGS | |||
Function | Location | Setting | |
» | Synchronous negotiation disabled | J1/jumper 1 | open |
| Synchronous negotiation enabled | J1/jumper 1 | closed |
» | Factory test disabled | J1/jumper 2 | open |
| Factory test enabled | J1/jumper 2 | closed |
» | SCSI parity checking enabled | J1/jumper 3 | open |
| SCSI parity checking disabled | J1/jumper 3 | closed |
» | LA enable (Only on early W1542A) | J8 | closed |
| LA disable (Only on early W1542A) | J8 | open |
» | Auto request sense enabled | J9/jumper 1 | open |
| Auto request sense disabled | J9/jumper 1 | closed |
» | Factory configured - do not alter | J9/jumpers 2-4 | open |
» | BOIS enabled | J11 | closed |
| BIOS disabled | J11 | open |
» | Floppy address 3F0-3F7h | J12 | open |
| Floppy address 370-377h | J12 | closed |
» | Floppy drive enabled | J13 | closed |
| Floppy drive disabled | J13 | open |
» | Floppy drive Interrupt is IRQ6 | J17 | pins 1 & 2 closed |
| Floppy drive Interrupt is IRQ10 | J17 | pins 2 & 3 closed |
» | Floppy drive DMA Request is DREQ2 | J18 | pins 1 & 2 closed |
| Floppy drive DMA Request is DREQ3 | J18 | pins 2 & 3 closed |
» | Floppy drive DMA Acknowledge Is DACK2 | J19 | pins 1 & 2 closed |
| Floppy drive DMA Acknowledge is DACK3 | J19 | pins 2 & 3 closed |
DMA CHANNEL | |||||
DRQ | J1/Jumper 7 | J1/Jumper 8 | J14 | J15 | |
| 0 | closed | closed | Jumper 1-closed | Jumper 1-closed |
» | 5 | open | closed | Jumper 2-closed | Jumper 2-closed |
| 6 | closed | open | Jumper 3-closed | Jumper 3-closed |
| 7 | open | open | Jumper 4-closed | Jumper 4-closed |
INTERRUPT REQUEST | |||||
IRQ | J1/Jumper 9 | J1/Jumper 10 | J1/Jumper 11 | J16 | |
| 9 | open | open | open | Jumper 1-closed |
| 10 | closed | open | open | Jumper 2-closed |
» | 11 | open | closed | open | Jumper 3-closed |
| 12 | closed | closed | open | Jumper 4-closed |
| 14 | open | open | closed | Jumper 5-closed |
| 15 | closed | open | closed | Jumper 6-closed |
DMA TRANSFER RATE | |||
Speed | J1/jumper 12 | J1/jumper 13 | |
» | 5.0 | open | open |
| 5.7 | closed | open |
| 6.7 | open | closed |
| 8.0 | closed | closed |
I/O PORT ADDRESS | ||||
Address | J6/Jumper 1 | J6/Jumper 2 | J6/Jumper 3 | |
| 334h | open | open | open |
» | 330h | open | open | closed |
| 234h | open | closed | open |
| 230h | open | closed | closed |
| 134h | closed | open | open |
| 130h | closed | open | closed |
BUS WAIT STATE | |||||
Delay | J7/jumper 1 | J7/jumper 2 | J7/jumper 3 | J7/jumper 4 | |
» | Disable | closed | open | open | open |
| 100nsec | open | closed | open | open |
| 200nsec | open | open | closed | open |
| 300nsec | open | open | open | closed |
BIOS ADDRESS | |||
Address | J10/jumper 1 | J10/jumper 2 | |
» | DC000h | open | open |
| CC000h | closed | open |
| D8000h | open | closed |
| C8000h | closed | closed |
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